Fervenza do Toxa, Waterfall in Pontevedra, Spain.

Fervenza do Toxa is a waterfall on the Toxa River in the parish of Pazos, Silleda, Pontevedra. The river drops over 60 metres in free fall, making it the highest free-falling waterfall in Galicia. It lies just before the Toxa joins the Deza, about 40 km from Santiago de Compostela.

The waterfall lies in the Toxa River valley near its confluence with the Deza, in the parish of Pazos, Silleda. The monastery of San Lourenzo de Carboeiro, founded in the 10th century by the counts of Deza, stands nearby. The area also preserves Roman remains such as roads, mines and the Merza bridge, and the medieval bridge of Taboada on the Vía da Prata pilgrimage route.

The name combines the Galician word fervenza, meaning waterfall, with Toxa, the river that forms it. The cascade lies in the parish of Pazos, in the municipality of Silleda, in the comarca of Deza. Nearby stands the Monastery of San Lorenzo de Carboeiro, founded in the 10th century by the counts of Deza, and the medieval bridge of Taboada carries pilgrims on the Vía da Prata.

Access is from the N-525 Zamora–Santiago road, turning off at Bandeira onto the PO-204 towards Pazos, near Merza, in the parish of Pazos, Silleda. The Toxa drops over 60 metres just before joining the Deza, about 40 km from Santiago. Information on the area is available from the Servizo de Medio Ambiente Natural de Pontevedra and the councils of Silleda and Vila de Cruces.

The Toxa plunges over 60 metres in free fall, the highest of its kind in Galicia. The river joins the Deza just below the falls, and the surrounding granite and gneiss crags shelter peregrine falcons and ravens; trout fill the streams, drawing many anglers.